Lifting-jack.



PATENTED JULY 14, 1903..

R. B. MURPHY. LIFTING JACK.

APPLICATION FILED APR.14, 1903.

N0 MODEL.

LITHIL. wnsnmnrcn u c UNITED STATES Patented .iuly 14, 1903 ROY B.MURPHY, OF HOT SPRINGS, ARKANSAS.

LIFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 733,414, dated July 14,1903.

Application filed April 14, 1903. $er1alNo. 152,538; (No model.)

To all whom it may concern:

Be it known that I, ROY B. MURPHY, a citizen of the United States,residing at Hot Springs, in the county of Garland and State of Arkansas,have invented certain new and useful Improvements in Lifting-Jacks; andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the figures of reference marked thereon,which form a part of this specification.

My invention is a lifting-jack; and it consists of a base, an uprightshaft rising from said base, a lever pivoted to the upper end of saidupright shaft, bites pivoted to said lever, and a lifting-rod adapted tobe moved up and down by said bites and lever.

In the accompanying drawings, Figure 1 is a perspective view of myinvention. Fig. 2 is a front face view. Fig. 3 is a rear face view ofthe same.

My invention is described as follows: 1 represents the base; 2, theupright shaft secured thereto; 3, an upper eyebolt secured in the upperend of said shaft, the bolt 4 extending some distance to the rear of theshaft; 5, a nut working on said bolt and against the rear face of saidshaft; 6, a lever pivoted on said bolt 1; 7, the nut securing said leveron the bolt 1; 8, a lower eye secured to said shaft. The lever 6 isprovided with two perforations, one, 9, in rear of the bolt 1 and theother, 10, in front thereof. In the rear perforation 9 of the lever issecured a link 11, and to the lower end of the link 11 is secured a bite12, which surrounds a lifting-rod 13. Said bite is provided with ahandle or arm 14. In the front perforation 10 is secured the upper endof another link 15, and to the lower end of said link is secured anotherbite 16.

The lifting-rod 13 is provided with a foot 17. To raise the lifting-rod,I pull down on the lever, and the first operation is to bring the upperbite 12 against the surface of the rod and raise it, and when I raisethe lever to take another hold the bite 16 takes hold and continues themovement of the liftingrod upwardly. The bites 12 and 16 operatealternately. When the foot 17 is raised as high as I want it, the leveris allowed to come to a rest and then to let the lifting-rod down, raisethe lever 6 sufficient to loose bite 12, then raise handle 14, thenlower lever 6 until bite 16 rests on eyebolt 8, which releases bite andfrees the lifting-rod 13, and it drops.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

An upright shaft, secured to a base; an eyebolt secured in said shaft;another eyebolt secured to said shaft, some distance below the eyeboltjust mentioned; a lever pivoted to the bolt of said first-mentionedeyebolt; a lifting-rod passing up through the eyes of said eyebolts; alink pivoted to the short end of said lever; a bite provided with arms,and secured to the said link, the eye of said bite surrounding thelifting-rod a link pivoted to the long end of said lever; a bite securedto the lower end of said link, its eye surrounding said lifting-rod,substantially as shown and described and for the purposes set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ROY B. MURPHY;

Witnesses:

ALPHONZO CURL, JAMES R. O. TATE.

